Sweet and savory flavor profiles have a long, love-hate history among fast-food fans — from Yum! Brands  (YUM) – Get Yum! Brands, Inc. Report-owned KFC’s Fried Chicken And Donuts Sandwich to dipping one’s fries in a Wendy’s  (WEN) – Get Wendy’s Company Report Frosty, there’s nothing quite like mixing flavor profiles that many consider to be unmixable to generate internet buzz.

Those two may be the most famous, but they’re hardly the only official (or unofficial sweet and savory fast-food offerings. Few knew that a Krispy Kreme Sloppy Joe was once sold at state fairs, albeit not by the company while few can forget the McDonald’s (MCD) – Get McDonald’s Corporation Report McGriddle, a breakfast sandwich where two syrup-sweetened pancakes replacing the biscuit, bagel, or English Muffin.